Search found 164 matches

by haroldoop
Tue Jul 14, 2026 3:16 pm
Forum: Demos
Topic: Jazz Jackrabbit for Sega Genesis
Replies: 1
Views: 2420

Jazz Jackrabbit for Sega Genesis

This is a very early W.I.P. vibe-port of Jazz Jackrabbit to run as a Sega Genesis / Mega Drive ROM, created using Arena and polished using Claude.

Github repo: https://github.com/haroldo-ok/jazz-jackrabbit-for-sega-genesis
Itch.io page: https://haroldo-ok.itch.io/jazz-jackrabbit-genesis
Youtube ...
by haroldoop
Thu May 21, 2026 9:35 am
Forum: Demos
Topic: God of Thunder for Sega Genesis / Mega Drive
Replies: 0
Views: 4551

God of Thunder for Sega Genesis / Mega Drive

This is a vibe-port experiment where I'm trying to port the game "God of Thunder" from MS-DOS to Sega Genesis / Mega Drive.

Repository of the Sega Genesis port: https://github.com/haroldo-ok/god-of-thunder-genesis
Itch.io page: https://haroldo-ok.itch.io/god-of-thunder-for-sega-genesis
Source code ...
by haroldoop
Tue May 19, 2026 9:52 am
Forum: Demos
Topic: XQuest 2 for Sega Genesis / Mega Drive
Replies: 0
Views: 3480

XQuest 2 for Sega Genesis / Mega Drive

This is a W.I.P. vibe-port experiment converting Mark Mackey's XQuest 2 from MS-DOS to Sega Genesis / Megadrive, using Claude.

Github repo: https://github.com/haroldo-ok/xquest2-md/tags
Page on itch.io: https://haroldo-ok.itch.io/xquest-2-md

https://img.itch.zone ...
by haroldoop
Fri Dec 26, 2025 10:26 am
Forum: SGDK
Topic: Separate vertical scale per-column...is it possible?
Replies: 1
Views: 39817

Re: Separate vertical scale per-column...is it possible?

In theory, yes; it would require some experimentation to see how often that update can be performed per frame
by haroldoop
Thu Nov 09, 2023 11:05 pm
Forum: Tools
Topic: choice4genesis - a ChoiceScript clone for the Sega Genesis
Replies: 31
Views: 188596

Version 0.4.3 is now available!

Bugfixes since 0.4.0:
- Fixed bug that happened when the background filenames had special chars;
- Fixed repeated variable names when using similar file names: where both 1chr1v1.png and #1chr1v1.png used to produce the same variable name, causing compilation errors;
- Fixed a bug where the ...
by haroldoop
Wed Sep 13, 2023 10:40 pm
Forum: Tools
Topic: SGDK Video Player (work in progress)
Replies: 10
Views: 99869

Version 0.3.0 is now available!!!

Version 0.3.0 adds a flag to skip conversion if the files are unchanged.
by haroldoop
Mon Aug 28, 2023 9:40 pm
Forum: Tools
Topic: SGDK Video Player (work in progress)
Replies: 10
Views: 99869

Re: SGDK Video Player (work in progress)

Version 0.2.0 refactors the video player into a SGDK-compatible C library.
by haroldoop
Fri Aug 25, 2023 9:59 pm
Forum: Tools
Topic: SGDK Video Player (work in progress)
Replies: 10
Views: 99869

Created the CLI

Hello, again!

Version 0.1.0 refactors the disparate conversion scripts into a single coherent CLI.

To install:

npm install -g sgdk-video-player


How to use:

sgdk-video-player convert <src> <resDir>

Converts a video file and outputs the result in the resource directory

Positionals:
src The ...
by haroldoop
Sat Aug 19, 2023 11:00 am
Forum: Tools
Topic: SGDK Video Player (work in progress)
Replies: 10
Views: 99869

Re: SGDK Video Player (work in progress)

Version 0.0.8 uses a newer version of "rgbquant-sms", that allows for faster encoding and much less RAM usage.

I made a few experiments with multi-frame merging, but it's still too slow and glitchy to be useful; branch with multi-frame merging experiment: https://github.com/haroldo-ok/sgdk-video ...
by haroldoop
Tue Aug 15, 2023 1:45 pm
Forum: Tools
Topic: SGDK Video Player (work in progress)
Replies: 10
Views: 99869

SGDK Video Player Test v0.0.6 - Now with sound

Version v0.0.6 adds sound support, through SGDK's ADPCM driver.

ROM for version 0.0.6: https://github.com/haroldo-ok/sgdk-vide ... .6.bin.zip
Youtube video: https://www.youtube.com/watch?v=nsEKKbMpXrw
by haroldoop
Tue Aug 15, 2023 1:43 pm
Forum: Tools
Topic: SGDK Video Player (work in progress)
Replies: 10
Views: 99869

Re: SGDK Video Player (work in progress)

Chilly Willy wrote: Mon Aug 14, 2023 11:19 pm Pretty cool. Not bad for an old 68000 and 16 color tile graphics. :D
Thanks! :)
by haroldoop
Sun Aug 13, 2023 12:18 am
Forum: Tools
Topic: SGDK Video Player (work in progress)
Replies: 10
Views: 99869

Re: SGDK Video Player (work in progress)

Version 0.0.5 adds support for 320x224 resolution while not increasing the final compressed size very much.

Demo ROM for 0.0.5: https://github.com/haroldo-ok/sgdk-vide ... .5.bin.zip
Video on youtube: https://www.youtube.com/watch?v=gOZ-zpa7Tj8
by haroldoop
Fri Aug 11, 2023 9:28 am
Forum: Megadrive/Genesis
Topic: Megadrive vs Snes Hardware
Replies: 2
Views: 92350

Re: Megadrive vs Snes Hardware

Well while the MD CPU has twice the clock of the SNES one, the SNES CPU instructions take two times less clock cycles to perform the same instructions, which kinda evens things up from that angle. What really makes the MD faster is the data bus; while both use 16 bits CPU, the MD has a 16 bit data ...
by haroldoop
Thu Aug 10, 2023 10:59 pm
Forum: Tools
Topic: SGDK Video Player (work in progress)
Replies: 10
Views: 99869

Re: SGDK Video Player (work in progress)

Version 0.0.3 uses RgbQuant-SMS to reduce the tile count of each individual frame.

Demo ROM for 0.0.3: https://github.com/haroldo-ok/sgdk-vide ... .3.bin.zip
Youtube: https://www.youtube.com/watch?v=jnc3Tlc4bOc
by haroldoop
Sun Aug 06, 2023 9:37 pm
Forum: Tools
Topic: SGDK Video Player (work in progress)
Replies: 10
Views: 99869

Re: SGDK Video Player (work in progress)

Version 0.0.2 tries to use raster ints to stretch the background vertically; it's still very glitchy.

Example ROM for v0.0.2: https://github.com/haroldo-ok/sgdk-video-player/releases/download/v0.0.2/SGDK.Video.Player.Test.v0.0.2.bin.zip

--- edit ---

I guess the vertical stretching idea isn't ...